/*    Copyright 2013 10gen Inc.
 *
 *    This program is free software: you can redistribute it and/or  modify
 *    it under the terms of the GNU Affero General Public License, version 3,
 *    as published by the Free Software Foundation.
 *
 *    This program is distributed in the hope that it will be useful,
 *    but WITHOUT ANY WARRANTY; without even the implied warranty of
 *    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *    GNU Affero General Public License for more details.
 *
 *    You should have received a copy of the GNU Affero General Public License
 *    along with this program.  If not, see <http://www.gnu.org/licenses/>.
 *
 *    As a special exception, the copyright holders give permission to link the
 *    code of portions of this program with the OpenSSL library under certain
 *    conditions as described in each individual source file and distribute
 *    linked combinations including the program with the OpenSSL library. You
 *    must comply with the GNU Affero General Public License in all respects
 *    for all of the code used other than as permitted herein. If you modify
 *    file(s) with this exception, you may extend this exception to your
 *    version of the file(s), but you are not obligated to do so. If you do not
 *    wish to do so, delete this exception statement from your version. If you
 *    delete this exception statement from all source files in the program,
 *    then also delete it in the license file.
 */

#pragma once

#include <algorithm>
#include <cstdlib>

#include "mongo/base/status.h"
#include "mongo/logger/message_log_domain.h"

/*
 * Implementation of LogDomain<E>.  Include this in cpp files to instantiate new LogDomain types.
 * See message_log_domain.h, e.g.
 */

namespace mongo {
namespace logger {

    template <typename E>
        LogDomain<E>::LogDomain() 
        : _abortOnFailure(false)
    {}

    template <typename E>
    LogDomain<E>::~LogDomain() {
        clearAppenders();
    }

    template <typename E>
    Status LogDomain<E>::append(const E& event) {
        for (typename AppenderVector::const_iterator iter = _appenders.begin();
             iter != _appenders.end(); ++iter) {

            if (*iter) {
                Status status = (*iter)->append(event);
                if (!status.isOK()) {
                    if (_abortOnFailure) {
                        ::abort();
                    }
                    return status;
                }
            }
        }
        return Status::OK();
    }

    template <typename E>
    typename LogDomain<E>::AppenderHandle LogDomain<E>::attachAppender(
            typename LogDomain<E>::AppenderAutoPtr appender) {

        typename AppenderVector::iterator iter = std::find(
                _appenders.begin(),
                _appenders.end(),
                static_cast<EventAppender*>(NULL));

        if (iter == _appenders.end()) {
            _appenders.push_back(appender.release());
            return AppenderHandle(_appenders.size() - 1);
        }
        else {
            *iter = appender.release();
            return AppenderHandle(iter - _appenders.begin());
        }
    }

    template <typename E>
    typename LogDomain<E>::AppenderAutoPtr LogDomain<E>::detachAppender(
            typename LogDomain<E>::AppenderHandle handle) {

        EventAppender*& appender = _appenders.at(handle._index);
        AppenderAutoPtr result(appender);
        appender = NULL;
        return result;
    }

    template <typename E>
    void LogDomain<E>::clearAppenders() {
        for(typename AppenderVector::const_iterator iter = _appenders.begin();
            iter != _appenders.end(); ++iter) {

            delete *iter;
        }

        _appenders.clear();
    }

}  // namespace logger
}  // namespace mongo
